global standardization of network & transport protocols for its
TRANSCRIPT
Global Standardization of Network & Transport Protocols
ETSI TC ITS Workshop, 4.-6. February 2009
of Network & Transport Protocols for ITS with 5GHz Radio Technologies
Dr. Andreas FestagTC ITS WG3 Chairman
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Index
� Part 1: Overview of TC ITS WG3
� Objectives, links & liaisons� Technical approach� Status and work plan
� Part 2: Analysis of ITS Networking Approaches
� Overview of selected approaches� Comparison
ETSI TC ITS Workshop, 4.-6. February 2009
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Working Group Objectives
� Protocols for network and transport and their manag ement� Network architecture and its harmonization with ITS architecture� Novel communication protocols for ITS
• Ad hoc and multi-hop routing protocols• Reliable transport protocols over multi-hop routing , …
� IP integration incl. solutions for IP mobility, � IP integration incl. solutions for IP mobility, � Internetworking between different access networks� …
ETSI TC ITS Workshop, 4.-6. February 2009
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Links to Other Bodies, Projects, Organizations
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Technical Approach (1)
Current WG focus� Ad hoc & multi-hop networking for short range wirel ess tech.� Vehicle-to-vehicle and vehicle-to-roadside communic ation
Time x
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Time x
Time x + 2 sec
Solution needed to cope with frequent changes in network topology
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Technical Approach (2)
ETSI TC ITS Workshop, 4.-6. February 2009
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Technical Approach (3)
� Use of geographical positions for packet routing ov er short-range wireless technology
� “Geonetworking” for highly optimized networking in VANETs� For safety and infotainment applications
� Dissemination of safety event-driven information in geographical areas
7
areas� Heartbeat: broadcast of periodic information to nei ghbor nodes� Unicast: e.g. for local information
ETSI TC ITS Workshop, 4.-6. February 2009
Geographic UnicastGeographic Broadcast
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Technical Approach (4)
ReliabilityEfficiency
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InternetIntegration
DataSecurity
Privacy
Challenges
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ITS Network Architecture Under Discussion (1)
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Flexible architecture allows for various deployment scenarios
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ITS Network Architecture Under Discussion (2)
ETSI TC ITS Workshop, 4.-6. February 2009
ITS Station Protocol Stack ITS Station Components
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RequirementsScenariosNetwork Architecture
Base specificationGeoNetworking media-independentGeoNetworking media-dependent 5GHzIPv6 integrationBasic transport protocol
Status and Work Plan
10/2008 10/2009 10/201004/2008 04/2009 04/2010
Test specificationGeoNetworking media-independentGeoNetworking media-dependent 5GHzIPv6 integrationBasic transport protocol
TestingConformance testsInteroperability tests
C2C-CCDemo
ITS World Congress
ETSI TC ITS Workshop, 4.-6. February 2009
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Part 2: Analysis of ITS Networking Approaches
ETSI TC ITS Workshop, 4.-6. February 2009
GeoNetworking(ETSI TC ITS)
FAST(ISO TC 204)
WSMP(IEEE 1609)
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WSMP
� WAVE Short M essage P rotocol � High rate, low latency communication between WAVE devices on top of IEEE 802.11p
� Broadcasting of WAVE Short Messages to multiple (registered) applications(registered) applications
� Without WBSS (only on control channel), with WBSS (on control and service channel)
� UDP/TCP/IPv6 in parallel to WSMP
� Security header/trailer
ETSI TC ITS Workshop, 4.-6. February 2009
Source: IEEE Std 1609.3™-2007
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FAST: CALM Non-IP Networking“CALM Communication Kernel”
� High rate, low latency communication between CALM stations
� On top of interface abstraction (LLC extension, “virtual (LLC extension, “virtual channels”)
� Protocol has two phases� Service initialization
(announcement, optional confirmation), broadcast
� Service operation, unicast/broadcast
ETSI TC ITS Workshop, 4.-6. February 2009
Source: ISO/DIS 21217, Communications Access for Land Mobiles (CALM) - Architecture
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Comparison
WSMP FAST GeoNetworking
# Hops Single-hop Single hop Single-hop & Multi-hop
Communication Mode
Broadcast Broadcast & Unicast
Broadcast, Unicast, Geo-Broadcast,
Geo-Anycast
ETSI TC ITS Workshop, 4.-6. February 2009
Geo-Anycast
Group addressing
Via WBSS Via Service initialization
No BSS concept, but geo-addressing
Security Yes ? Yes (Optional?)
Wireless media IEEE 802.11pWAVE
Interface abstraction for
M5, IR, MM
Media-independent and media-dependent
part (e.g. for ITS European profile of
IEEE 802.11)
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Conclusion
� Currently, three ITS networking protocols are bein g standardized� Overlapping standards under development, with subst antial
technical differences between approaches� “Profiling” would allow to create a sets of global ITS standards
and to select technological components, such as “re gional” network protocols
ETSI TC ITS Workshop, 4.-6. February 2009
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THANK YOU FOR YOUR THANK YOU FOR YOUR ATTENTION
ETSI TC ITS Workshop, 4.-6. February 2009